Furnace-grate.



MARCUS EARENE-ST HANSELL, OF ANAMOSA., IOWA..

FURNACE-GRATE.

Specification of Letters Patent.

Patented Nev. 26, i9i2.

Application tiled April 17, 1912. `:Serial No. $91,364.-,

@dell 'whom it 'may concern:

it known that l, MARCUS E. HANsnLL, a citizen of the United States, and a resident ,of-Anamosa, in the county ofl J ones and State of iowa, have invented a new and lmproved Furnace-Grate, of which the following is a full, clear, and exactdescription.

My invention is intended more' 'particularly for embodiment in the grates of steam boiler furnaces, and it relates to that type of grate in which4 removable grate sections are pe-ovided f ,dan object of my invention is to improve the-grates in various particulars to the end 'that thegrate sections, the grate bars, and

drawings forming a part of this specificatieminwhmh similar characters of referencevr indicate corresponding parts in all the views. j

Figure 1 is -amvertical section taken through the'grate transversely bf the grate bars', andshowing the same in position; Fig` 2 isa plan-view with some of the grate sections' removed; Fig. 3 is a detail transverse vertical section of one of the grate bars o n en'eiilarged scale, showing the end bartherefor; Fig. 4 is a vertical section jzaken parallel with the grate bars; Fig. `5` is a frag- .mentaryfpersp'ective viewof one( end of the grate bar; Fig. 6 is a perspective view of one of vthe removable rocking grate sections; Fignf? is a perspective view of one of the removable non-rockable end sections of the A grate; and Fig. 8 is a vertical section taken through the actuating devi'e for the rocking lever of thegrate.l

The fui-:nace may have any approved arrangement 'of vertical side walls 10 and front. wall 11,;'and in practice has the usual bridge Wall at-fthe rear of the fireboX, and convenlionally'fiiepresented in the drawings at 12. The furnace is provided wtith the usual front rest 13 and rear' rest 14 in the form of ledges,

and on these l removably mount rest bars 15,

ranging at the sides of the rebox from front to rear,

said rest bars being formed with ver? tical bearings 16 in which the ends l7.of rockable grate bars 18 are journaled. Auxiliary bearings 16a are provided in connectionvwith bearings 16 and inward therefrom, said auxiliary bearings being und cut so as to provide overhanging side wal s 19, the auxiliary bearings thus being wider at the bottom and having concave lower sides, as clearly shown in Fig. 2. ln addition to the journal 17, rockable grate bars 18 are formed, with members 20 on the under side which ,"wh'en the bars 18 are rocked, move in an arc between the walls of the auxiliary bearings 16*1 but should` the journal 17 break, then the members 2O will serve to constitute journals and find bearings in the auxiliary bearings 16a. During the movement of the rock bars 18 on the journals 17, the members 20 have limited movement, but upon any undue rocking movement of the grate bar, the members 2O will contact with the oveihanging walls 19 and limit the rockin of the grat-e bai'. On the bars 18 are fitted removable grate sections 21, which in practice are formed, as best shown in Fig. 6, withrec'esses 22 in the V,top surfaces to receive fine ashes which will prevent slagforming impurities from adhering to the top surface of the grate bars. The grate bars 18 have essentiallyflat sides, and the grate sections 21 are forked at the under side to produce slots 23, the side walls of which,l are enlarged as at 24 to provide recesses for thev circulation of the air, and preventing the grate bars from binding. The grate bars 18 are provided with depending arms 25 united by a link 26, towhich is connected an actuating bar 27, said bar being provided on `the upper edge with a rack 28, and extends through the front wall of the furnace, and rests upon a supporting roller 29 in a housing 30, suitably supported outside the front wall of the furnace. Mesliing with the rack teeth is a vertical pinion 31 that is mounted on the rock shaft 32 adapted to receive any suitable rock handle, so that the rocking of the shaft will move the toothed actuating bar V27 longitudinally., and rocking the grate bars 18 through the medium of the arms 25.

@nly the central grate bars are rockable in my improved grate, and in connection therewith I provide non-rockable front and rear grate gars 35, 36, which are formed s imilarly to the bars 18, but are not provided with rock arms. The ends 37, 38 of the front and rear bars are received in vertical slots 39, 40, in the removable end .supports which arms 45b are received respectively on y the front land rear ledges 13, 14, on which the end supports 15 rest.

In connectionl with the pinion 81, a latch device is provided to lock the rack bar 27, 28, and consequently lock the grate bars 17 and their grate sections 21 in a given position. The latch device in the present instance consists of pins 48 on a plate 49 that swings around its securing pin or screw 50, and is providedwith an operating knob 51, so that the lateral rocking of the plate 49 willengage the pins 48 between the teeth of the pinion 31, or disengage the pins from said pinion.

By providing stationary front and rear grates with removable sections, co-acting with rockable grate sections, a distinct advantage is obtained in the cleaning of the fires and in keeping the fires clear, as the sections will clear themselves of clinkers.

The form of the described construction of the removable grate sections and rocking grate bars permits of the grate sections being removed and replaced by simply sliding the grate sections on. the bars without there being any necessity of tilting the grate bars from their horizontal position. With my construction, a broken grate section may be removed and a new one put in place while the fire is in the furnace, since it may be done by a slight rocking of the grate bar, which will afford convenient working space for the attendant to insert the new grate .bar promptly and conveniently. In prac-l tice, a suitable tool is employed for lifting a grate section out of place and placing a new section in posit-ion.

The stationary or non-rockable grate bari is wider than the solid dead plate usually used, and can be wider because it is ventilated. The distance.between the advancing points of the rocking and grate bars and the bridge wall or furnace front above the nonrocking grate 'barA weakens the clinkersj resistance and breaksthem upward with less power used and consequently with less chance Having thus described my invention, I claim as new and desire to secure by Letters Patent;

1. In a grate, the combination of end supports and grate bars, the said supports having a main bearing and an .auxiliary bearing Jfor the adjacent end of ay grate bar, both of said bearings being open at the top, and the auxiliary bearing being within the` vertical plane of the main bearing and belowthe same, the auxiliary bearing being undercut, presenting overhanging side wallsconverging in anupward direction and being wider atl the bottom, the lowerwall 4of the bearing being concave and the grate .bar be?- `of the clinkers forming such an obstacle as i to arrestthe movement of thevrocking bar.y

2. In combination with rockable grate bars having depending arms, a reciprocating rack bar connected with said arms, a pinion lhaving a horizontal axis. and meshing with said rack bar at its outer end, a

housing -for the pinion and the adjacent outer end of the rack bar, a plate pivoted on the housing to swing transversely in a horizontal plane parallel with the axis of the pinion, and a depending piny on the' under side of the platemovable into engage-,

ment with the teeth ofthe pinion by a movement of the pivoted plate.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

MARCUS EARENEST HANSELL.

Witnesses:

EARL BOYER, JAMES E. REMLEY. 

